Low ICP when Hot
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Joined: Jun 2013
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It is an OEM oil cap and filter with almost fresh Rotella T6 in it. I wont have access to a full scan tool til monday to read IPR duty cycle. I just want to be sure its the pump before I go in that far for repairs
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Joined: Jun 2013
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UPDATE
I went up and ran the truck today. Previously had a misfire on cylinder 3 when doing a contribution test but now 3 is running fine and the miss has moved to cylinders 4 and 6 when first started. the truck ran with very little power on a street tune and still had a slight miss on the stock tune. When restarted again the miss completely disappeared. With engine warmed up the EOT was 180*F, ICP actual and desired were identical at 612 psi and the IPR duty cycle was at 24% at idle. We commanded the IPR to 45% closed and were getting 1500psi actual ICP at idle. The HPO system is strong just as predicted and we are ruling out a HPO leak also
Fleet Owner
Joined: Nov 2003
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Not sure where to go with this problem anymore. The truck runs after starting wither its a cold start or hot start but will not always start when warm. I have recently replaced the IPR, Oil Cooler, FICM, and did an EGR delete. When the engine is cold it will fire right up and makes great power. ICP actual and ICP desired are within a couple psi of each other through all RPM ranges but when hot the ICP actual is only about 320 psi and slowly builds while cranking but never enough to start. I have run out of ideas and don't want to keep throwing any more money into it. There are no misses found in a contribution test when running warm and the truck doesn't have standpipes or dummy plugs. Any advice will be appreciated
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